Maresi, Sinta Ramadhania Putri, et al. “Early Swelling Kinetics of Chitosan Hydrogels under Different Acidity Conditions for Designing Controlled-Release Fertilizers”. Applied Environmental Science, vol. 4, no. 1, July 2026, pp. 21-37, doi:10.61511/aes.v4i1.2026.3710.